[libcxx] r332785 - Implement deduction guides for <deque>
Marshall Clow via cfe-commits
cfe-commits at lists.llvm.org
Fri May 18 16:44:13 PDT 2018
Author: marshall
Date: Fri May 18 16:44:13 2018
New Revision: 332785
URL: http://llvm.org/viewvc/llvm-project?rev=332785&view=rev
Log:
Implement deduction guides for <deque>
Added:
libcxx/trunk/test/std/containers/sequences/deque/deque.cons/deduct.fail.cpp
libcxx/trunk/test/std/containers/sequences/deque/deque.cons/deduct.pass.cpp
Modified:
libcxx/trunk/include/deque
Modified: libcxx/trunk/include/deque
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/deque?rev=332785&r1=332784&r2=332785&view=diff
==============================================================================
--- libcxx/trunk/include/deque (original)
+++ libcxx/trunk/include/deque Fri May 18 16:44:13 2018
@@ -128,6 +128,10 @@ public:
void clear() noexcept;
};
+template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>
+ deque(InputIterator, InputIterator, Allocator = Allocator())
+ -> deque<typename iterator_traits<InputIterator>::value_type, Allocator>;
+
template <class T, class Allocator>
bool operator==(const deque<T,Allocator>& x, const deque<T,Allocator>& y);
template <class T, class Allocator>
@@ -921,13 +925,14 @@ class __deque_base
{
__deque_base(const __deque_base& __c);
__deque_base& operator=(const __deque_base& __c);
-protected:
- typedef _Tp value_type;
+public:
typedef _Allocator allocator_type;
typedef allocator_traits<allocator_type> __alloc_traits;
+ typedef typename __alloc_traits::size_type size_type;
+protected:
+ typedef _Tp value_type;
typedef value_type& reference;
typedef const value_type& const_reference;
- typedef typename __alloc_traits::size_type size_type;
typedef typename __alloc_traits::difference_type difference_type;
typedef typename __alloc_traits::pointer pointer;
typedef typename __alloc_traits::const_pointer const_pointer;
@@ -946,6 +951,7 @@ protected:
typedef __deque_iterator<value_type, const_pointer, const_reference, __map_const_pointer,
difference_type> const_iterator;
+protected:
__map __map_;
size_type __start_;
__compressed_pair<size_type, allocator_type> __size_;
@@ -1461,6 +1467,23 @@ private:
void __move_assign(deque& __c, false_type);
};
+#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES
+template<class _InputIterator,
+ class _Alloc = typename std::allocator<typename iterator_traits<_InputIterator>::value_type>,
+ class = typename enable_if<__is_allocator<_Alloc>::value, void>::type
+ >
+deque(_InputIterator, _InputIterator)
+ -> deque<typename iterator_traits<_InputIterator>::value_type, _Alloc>;
+
+template<class _InputIterator,
+ class _Alloc,
+ class = typename enable_if<__is_allocator<_Alloc>::value, void>::type
+ >
+deque(_InputIterator, _InputIterator, _Alloc)
+ -> deque<typename iterator_traits<_InputIterator>::value_type, _Alloc>;
+#endif
+
+
template <class _Tp, class _Allocator>
deque<_Tp, _Allocator>::deque(size_type __n)
{
Added: libcxx/trunk/test/std/containers/sequences/deque/deque.cons/deduct.fail.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/containers/sequences/deque/deque.cons/deduct.fail.cpp?rev=332785&view=auto
==============================================================================
--- libcxx/trunk/test/std/containers/sequences/deque/deque.cons/deduct.fail.cpp (added)
+++ libcxx/trunk/test/std/containers/sequences/deque/deque.cons/deduct.fail.cpp Fri May 18 16:44:13 2018
@@ -0,0 +1,42 @@
+//===----------------------------------------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <array>
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+// UNSUPPORTED: libcpp-no-deduction-guides
+
+
+// template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>
+// deque(InputIterator, InputIterator, Allocator = Allocator())
+// -> deque<typename iterator_traits<InputIterator>::value_type, Allocator>;
+//
+
+
+#include <deque>
+#include <iterator>
+#include <cassert>
+#include <cstddef>
+#include <climits> // INT_MAX
+
+struct A {};
+
+int main()
+{
+// Test the explicit deduction guides
+
+// Test the implicit deduction guides
+ {
+// deque (allocator &)
+ std::deque deq((std::allocator<int>())); // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'deque'}}
+// Note: The extra parens are necessary, since otherwise clang decides it is a function declaration.
+// Also, we can't use {} instead of parens, because that constructs a
+// deque<allocator<int>, allocator<allocator<int>>>
+ }
+
+}
Added: libcxx/trunk/test/std/containers/sequences/deque/deque.cons/deduct.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/containers/sequences/deque/deque.cons/deduct.pass.cpp?rev=332785&view=auto
==============================================================================
--- libcxx/trunk/test/std/containers/sequences/deque/deque.cons/deduct.pass.cpp (added)
+++ libcxx/trunk/test/std/containers/sequences/deque/deque.cons/deduct.pass.cpp Fri May 18 16:44:13 2018
@@ -0,0 +1,98 @@
+//===----------------------------------------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <array>
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+// UNSUPPORTED: libcpp-no-deduction-guides
+
+
+// template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>
+// deque(InputIterator, InputIterator, Allocator = Allocator())
+// -> deque<typename iterator_traits<InputIterator>::value_type, Allocator>;
+//
+
+
+#include <deque>
+#include <iterator>
+#include <cassert>
+#include <cstddef>
+#include <climits> // INT_MAX
+
+#include "test_macros.h"
+#include "test_iterators.h"
+#include "test_allocator.h"
+
+struct A {};
+
+int main()
+{
+
+// Test the explicit deduction guides
+ {
+ const int arr[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
+ std::deque deq(std::begin(arr), std::end(arr));
+
+ static_assert(std::is_same_v<decltype(deq), std::deque<int>>, "");
+ assert(std::equal(deq.begin(), deq.end(), std::begin(arr), std::end(arr)));
+ }
+
+ {
+ const long arr[] = {INT_MAX, 1L + INT_MAX, 2L, 3L };
+ std::deque deq(std::begin(arr), std::end(arr), std::allocator<long>());
+ static_assert(std::is_same_v<decltype(deq)::value_type, long>, "");
+ assert(deq.size() == 4);
+ assert(deq[0] == INT_MAX);
+ assert(deq[1] == 1L + INT_MAX);
+ assert(deq[2] == 2L);
+ }
+
+// Test the implicit deduction guides
+
+ {
+// We don't expect this one to work.
+// std::deque deq(std::allocator<int>()); // deque (allocator &)
+ }
+
+ {
+ std::deque deq(1, A{}); // deque (size_type, T)
+ static_assert(std::is_same_v<decltype(deq)::value_type, A>, "");
+ static_assert(std::is_same_v<decltype(deq)::allocator_type, std::allocator<A>>, "");
+ assert(deq.size() == 1);
+ }
+
+ {
+ std::deque deq(1, A{}, test_allocator<A>()); // deque (size_type, T, allocator)
+ static_assert(std::is_same_v<decltype(deq)::value_type, A>, "");
+ static_assert(std::is_same_v<decltype(deq)::allocator_type, test_allocator<A>>, "");
+ assert(deq.size() == 1);
+ }
+
+ {
+ std::deque deq{1U, 2U, 3U, 4U, 5U}; // deque(initializer-list)
+ static_assert(std::is_same_v<decltype(deq)::value_type, unsigned>, "");
+ assert(deq.size() == 5);
+ assert(deq[2] == 3U);
+ }
+
+ {
+ std::deque deq({1.0, 2.0, 3.0, 4.0}, test_allocator<double>()); // deque(initializer-list, allocator)
+ static_assert(std::is_same_v<decltype(deq)::value_type, double>, "");
+ static_assert(std::is_same_v<decltype(deq)::allocator_type, test_allocator<double>>, "");
+ assert(deq.size() == 4);
+ assert(deq[3] == 4.0);
+ }
+
+ {
+ std::deque<long double> source;
+ std::deque deq(source); // deque(deque &)
+ static_assert(std::is_same_v<decltype(deq)::value_type, long double>, "");
+ static_assert(std::is_same_v<decltype(deq)::allocator_type, std::allocator<long double>>, "");
+ assert(deq.size() == 0);
+ }
+}
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